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Author Topic: The new DUC/DDC SunSDR2 transceiver  (Read 50923 times)
ZENKI
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Posts: 906




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« Reply #30 on: July 14, 2012, 04:05:46 PM »

Yeah just as risky as dealing with a company like Ebay and individuals on EBay.

People make comments on someone in Russian and ask how secure their web shopping carts are. We never hear comments of the number of USA  based ham companies who dont even encrypt your private details when you buy from
their shopping carts. Sure the credit cards enforce HTTPS however when enter your personal details  the form is not secure. Array Solutions is one such company secure credit card entry, name address and other details in a open form!  Identity data is just as valuable as credit card number to the crooks. You have to transmit  your private details on un-secure non encrypted web forms.  What is even more ludicrous is the number of ham companies who expect you to enter credit car details in non secure web pages that does not even enforce secure connections for the credit card details.

Unfortunately regardless of  country you best take your own pro-active measures and avoid any ordering site that does not enforce HTTPS on all transaction details. When you monitor these transaction web pages they automatically selling your private address details  as you do the transaction.  These days all connections to the internet should enforce HTTPS, otherwise you leaking critical private information to crooks of the world.

The rule of thumb when playing the international shopping game is that you shouldn't gamble more than you can afford to lose.

You said it all here.  On this point we agree.  Dealing with a company like this will be a very risky gamble.

Gene
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RN6LHF
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« Reply #31 on: June 22, 2013, 12:47:50 PM »

Dear friends,
We are pleased to invite you to our stand at the Europe's largest amateur radio exhibition HamRadio 2013, June 28 - 30, Friedrichshafen, Germany. You will find us in the hall A1 on the stand 502.
At our stand You can see the new SunSDR2 - DUC/DDC HF/6M/VHF transceiver in full configuration, controlled by our new ExpertSDR2 software and SDR-control panel E-Coder.
You can see and test our equipment, share experiences and get answers to all your questions from our experts.

Features of the new ExpertSDR2 software:
The new own fast DSP core in the ExpertSDR2 and a new GUI.
Supports Windows OS (all versions), Linux OS, MAC OS(in future).
Comfortable user interface, user is long works but his eyes not tire also in the dark.
Two independent receivers with bandwidth of panadapter up to 312 kHz. Can work inside the Nyquist zone 0-80 MHz and 80-160 MHz.
One sub RX for each receiver. (4 receivers in all).
Bandscope with bandwidth up to 80 MHz.
Independent CAT and VAC for each receiver.
Broadcast Wide FM demodulator for FM bands.
Independent IQ recorder for each receiver.
An each receiver and a bandscope can be used on a different displays.

Also a new feature is hardware defined CW core. Monitoring delay in CW in TX mode is 8-10ms, a delay from pushing on Key to transmiting a signal in air is 15-20ms.
Basic info about hardware features on the first page of this thread.

Some pictures with ExpertSDR2 interface.
http://www.cqham.ru/foto/data/500/ESDR21.jpg One receiver
http://www.cqham.ru/foto/data/500/ESDR22.jpg Two receivers, and two sub RX. Vertical.
http://www.cqham.ru/foto/data/500/ESDR23.jpg Two receivers, and two sub RX. Horizontal.
http://www.cqham.ru/foto/data/500/ESDR24.jpg Two receivers, and two sub RX. Different windows.
http://www.cqham.ru/foto/data/500/ESDR25.jpg One receiver and bandscope 80 MHz.
http://www.cqham.ru/foto/data/500/ESDR26.jpg Two receivers and bandscope in different windows.
http://www.cqham.ru/foto/data/500/ESDR27.jpg One receiver, waterfall monohrome
http://www.cqham.ru/foto/data/500/ESDR28.jpg One receiver, waterfall monohrome. Options.
http://www.cqham.ru/foto/data/500/ESDR29.jpg 20meters band, BPSK - high resolution of spectrum (FFT size 16384 or RBW = 2.4Hz)
http://www.cqham.ru/foto/data/500/ESDR210.jpg 40 meters band, CW mode
http://www.cqham.ru/foto/data/500/ESDR211.jpg 40 meters band

Best regards,
Vasily RN6LHF

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ZENKI
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Posts: 906




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« Reply #32 on: June 24, 2013, 01:54:14 AM »

Whats the transmitter IMD specifications?

When I see no IMD specifications I just say same old same old, poor IMD specifications.

A state of the art receiver with  lousy poor performing transmitters are everywhere.  I suppose this design will be  in the same basket.

Wake me up when some SDR manufacturers produces a transceiver who transmitter performance matches its excellent receiver performance. All we seem to get is transmitters that are no better than a CB radio.

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RN6LHF
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« Reply #33 on: June 24, 2013, 03:25:32 AM »

Whats the transmitter IMD specifications? ...
The transmitter IMD specifications is:
output power 20W --  -30dB
output power 10W --  -45dB
DAC out 10mW --  -70dB
All amplifiers that use low power supply voltage about 12-15 V have the IMD about 30dB at maximum output power. We use RD16HHF transistors in end of stage and it is normal for this transistors. Transceiver can be used as a base station and a portable and it is cause for use low voltage transistors with IMD up to -30dB.
Also user can use high speed DAC out with excelent IMD and use external Amplifier with high voltage power supply like 50V, 100V or more... These type of amplifiers usually have IMD not worse then -40dB..-50dB at max output power.
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NI0Z
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« Reply #34 on: June 24, 2013, 04:26:20 AM »

I think one of the next things we will start seeing is the higher voltage PA's and that should start us on the path towards better transmit.
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ZENKI
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Posts: 906




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« Reply #35 on: July 05, 2013, 07:24:01 PM »

Thanks for the update useful information.

We all searching out for transmitters with better IMD performance. Its just not achievable with a 12 to 15 volt PA.

Thanks

Whats the transmitter IMD specifications? ...
The transmitter IMD specifications is:
output power 20W --  -30dB
output power 10W --  -45dB
DAC out 10mW --  -70dB
All amplifiers that use low power supply voltage about 12-15 V have the IMD about 30dB at maximum output power. We use RD16HHF transistors in end of stage and it is normal for this transistors. Transceiver can be used as a base station and a portable and it is cause for use low voltage transistors with IMD up to -30dB.
Also user can use high speed DAC out with excelent IMD and use external Amplifier with high voltage power supply like 50V, 100V or more... These type of amplifiers usually have IMD not worse then -40dB..-50dB at max output power.
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ZENKI
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Posts: 906




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« Reply #36 on: July 05, 2013, 07:28:19 PM »

We all hopeful in this regard.

The new Palstar transceiver has taken the first step toward better transmitter IMD.
Palstar should be congratulated for taking this first step and moving  towards using high voltage RF fets.
-48db 3rd order distortion from the Palstar radio is an excellent achievement for a ham radio product.

It seems 1  manufacturer is at least listening. Maybe Palstar will produce a 100 or 200 watt version of their radio with equally good IMD performance.


I think one of the next things we will start seeing is the higher voltage PA's and that should start us on the path towards better transmit.
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RN6LHF
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« Reply #37 on: July 07, 2013, 12:24:09 AM »

Yes, we can get low distortions with high voltage output stage. This is a simple way for get it, but a simple not mean the best. It is achievable with a 12 to 15 volt PA. Also we are think that more interesting a DSP correction of the transmitted signal for linearity without high voltage PA. This practice are used in GSM Base stations and start to have some popularity in transmitters for HF. It can be maked without hardware modification, only software, because this is software defined radio. But it is not available for classical transceivers only for DUC/DDC SDRs.

In HAM RADIO 2013 on our stend was interested visitor who works in CW with very high speeds. We asked him to try to keying in CW mode on SunSDR2 and try to feel delay. As a result he set maximum speed for latest version software the ExpertSDR2 and it was 60 WPM(!!!).  He not feeling delays, but after one minute keying he asked us to make some correction in duration of dot/dash. After correction all was great. The test has a good result.

Thanks for the update useful information.

We all searching out for transmitters with better IMD performance. Its just not achievable with a 12 to 15 volt PA.

Thanks
« Last Edit: July 07, 2013, 12:41:42 AM by RN6LHF » Logged
RN6LHF
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Posts: 45




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« Reply #38 on: July 07, 2013, 03:20:23 AM »

Some photo from exhibition HAM RADIO 2013 is here.
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RN6LHF
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« Reply #39 on: July 26, 2013, 05:52:08 AM »

Latest version of ExpertSDR2 software provide to use IQ-files with bandwidth of panadapter up to 300kHz. Also ExpertSDR2 software is supports IQ-files from HDSDR, WinRad, Perseus(need to test), PowerSDR(need to test).
Every one can to download a free software ExpertSDR2 and use it without hardware SunSDR2.

Url: f t p://sunsdr.com
Login : sunsdrcom_soft
Password : soft

Ftp folder SW: ftp:/new/ExpertSDR/ExpertSDR2/ExpertSDR2 0.7.0 (19.07.2013)/ESDR2 0.7.0 Player IQ.zip
Ftp folder IQ-files: ftp:/IQ Files/SunSDR2 IQ/

P.S. Sometimes need to set compability with Windows 7 or any version of Windows OS.
« Last Edit: July 26, 2013, 05:56:59 AM by RN6LHF » Logged
K5TED
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Posts: 699




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« Reply #40 on: August 01, 2013, 09:22:37 AM »

Latest version of ExpertSDR2 software provide to use IQ-files with bandwidth of panadapter up to 300kHz. Also ExpertSDR2 software is supports IQ-files from HDSDR, WinRad, Perseus(need to test), PowerSDR(need to test).
Every one can to download a free software ExpertSDR2 and use it without hardware SunSDR2.

Url: f t p://sunsdr.com
Login : sunsdrcom_soft
Password : soft

Ftp folder SW: ftp:/new/ExpertSDR/ExpertSDR2/ExpertSDR2 0.7.0 (19.07.2013)/ESDR2 0.7.0 Player IQ.zip
Ftp folder IQ-files: ftp:/IQ Files/SunSDR2 IQ/

P.S. Sometimes need to set compability with Windows 7 or any version of Windows OS.


Software doesn't launch. Fails with a missing .dll error.
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N9RO
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« Reply #41 on: August 01, 2013, 09:32:46 AM »

I loaded software on Win 8 Pro and had no problems, worked well.  Thanks for the demo.

Tim,  N9RO
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Real techies don't use knobs.
K5TED
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Posts: 699




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« Reply #42 on: August 01, 2013, 02:55:28 PM »

Apparently it doesn't like to run in a virtual XP machine. Seems to run OK on Win7 in compatibility mode on a real PC. 
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RN6LHF
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Posts: 45




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« Reply #43 on: August 07, 2013, 09:02:59 AM »

On the "Maykop 2013" HAM Fest for the first time was presented new concept of HAM Stand Alone Radio based on new DUC/DDC technologies via our transceiver SunSDR2. This is a prototype "SunSDR-MB1" HF/6M/VHF transceiver.
More information with photo and video is here.
In the video "SunSDR-MB1 transceiver. Presentation" and "SunSDR-MB1 transceiver. Presentation (back side)" a subtitles in English is available.
« Last Edit: August 07, 2013, 09:35:43 AM by RN6LHF » Logged
K5TED
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« Reply #44 on: August 09, 2013, 09:06:24 PM »

Very impressive
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